diff --git a/jquery/jquery-tests.ts b/jquery/jquery-tests.ts
index f8b05ea75..2fd4ff9cb 100644
--- a/jquery/jquery-tests.ts
+++ b/jquery/jquery-tests.ts
@@ -1239,7 +1239,7 @@ function test_extend() {
 
     var defaults = { validate: false, limit: 5, name: "foo" };
     var options = { validate: true, name: "bar" };
-    var settings = $.extend({}, defaults, options);
+    var settings: typeof defaults = $.extend({}, defaults, options);
 }
 
 function test_fadeIn() {
@@ -2331,4 +2331,4 @@ $.ajax({
     success: function (data) {
         alert(data);
     }
-});
\ No newline at end of file
+});
diff --git a/jquery/jquery.d.ts b/jquery/jquery.d.ts
index b8f67f32b..2ef4bb580 100644
--- a/jquery/jquery.d.ts
+++ b/jquery/jquery.d.ts
@@ -324,8 +324,8 @@ interface JQueryStatic {
     each(collection: JQuery, callback: (indexInArray: number, valueOfElement: HTMLElement) => any): any;
     each<T>(collection: T[], callback: (indexInArray: number, valueOfElement: T) => any): any;
 
-    extend(target: any, ...objs: any[]): Object;
-    extend(deep: boolean, target: any, ...objs: any[]): Object;
+    extend(target: any, ...objs: any[]): any;
+    extend(deep: boolean, target: any, ...objs: any[]): any;
 
     globalEval(code: string): any;